Improvement in saw-mills



nied tatet parte ewa.

,SIMON BARNHAR'I, 0F CHILLICOTHE, OHIO.

Letters Patent No. 96,868, dated November 16,1869. l

IMPROVEMENT IN SAW-MILLS.

The Schedule referred to in these LettersPatent and making part of the same.

To all whom tt may concern: l

nate the points which I believe to be new.

It is supported by pins l d, introduced through the brackets D, on the back side of the frame A.

When it is desired to remove the saw, the casing C is removed, by simply withdrawing thepins l d.

E is the rear portion ofthe table, beyond the saw. It is supported by the cross-timbers e, which are supported in the frame A by the aid of the pins a a.

In removing or exchanging the saw, the rear p0rktion E of the table is removed, by moving it bodily back, after having withdrawn the pins e u.

Referring to-the figures, it will be understood that, in sawing, the lumber is -fed from the left to 'the right.

G is a slide, adapted to move endwise within a strap, a, on the side of the frame A.

It is firmly fixed, at its outer end, to an upright framing, Gl, which, in turn, carries a stand, G2, adjustable vertically by means ot' the set-screw y, which stands in a slot, g', and secures it at various heights. o

It supports a roller, H, which may thus be adjusted at greater or less distances from thesaw, and level with the top of the table A, or at various distances above the table.

Y I is a corresponding slide, adapted to move in a corresponding strap, a?. y

It is connected, at its outer end, to the frame I, which is thus movablel out and in, so as to increase or diminish the dist-ance'om the saw.

The upper portion I2 is raised and lowered on the lower portion J, and adj usted atvarious levels bythe aid of the set-serewj, which stands inthe sloti'.

The upper framing I2 supports a roller, J', which is tlus adjustable out and in from' the saw, and also up and down from vthe table.

There-is a frame, K, which is also adjustable ont-v an'd in on the bar I, and carries a roller, L.

These rollers H', I, and L, serve a very important.

purpose in sawing material which is curved.

By adjusting the rollers at a proper height and disf V tance, I can adapt my machine to sawing stuii0 that is variously curved.

rlhey perform, also, an important function in sawing lumber which is naturally straight, but is so thin as to be 'very easily bent by its own weight. The

rollers may support the overhanging ends, and allow' them to lay flat on the table.

In sawing most flexible material, however, I prefer to set the rollers a little higher than the table. The amount ot' such excess in height depends on the thinness and fiexibility of the material to be used.

I set the rollers at such height that they will hold the lumber entirely clear of' the table, except where it is drawn down by the action of the saw, or by the hands ofthe attendant, or both. v

These rollers, and the adjustable frames which support them, greatly facilitate the adjustment of the mill to be used out of doors, on any uneven surface, the rollers lbeing raised or lowered to suit the'place where the mill stands.

Vhen they are not needed, they can be drawn in, or slipped back under the machine, so that they are out of the way.

The entire machine is very easily taken apart and moved, and again set-up for operation. can be taken apart and again made. ready for operation in two minutes.

The wheel B is hung on the side of the machine, opposite from the table, and thus tends to balance the machine, and avoid the necessity for any prop or leg under the table.

I employ the balance-weight b', placed, as represented, on the wheel B'. rIhis tends to always turn the wheel so as to bring its weight to the extreme lowermost position.

In such position, the pitman M stands alittle inclined, being connected. to the treadle N by the pin m, a little nearer the foot, so that it is certain to draw in that direction, and turn the wheel toward the operator. The wheel cannot, under these conditions, start wrong.

Putting the foot on the treadle, with the machine at rest, it will always startby turning toward the o1- erator, which is the right direction.

The machine..

I olaim- 1. The removable' parts C and D, arranged relatively to each other, and to die frame A and saw B, as and for the purposes herein seb forth.

2. In combination with a portable saw-mill, A B, substantially of the character herein described, the end-supports H and J with means, as specified, for adjusuting them, notvonly outwardly and inwardly, but

up and down, at will, substantially as and for thepurposes herein setz forth.

In testimonyl whereof, I have hereunto set my name, in presence of two subscribing Witnesses.

SIMON BARNHART. fitnesses v AARON ELLIOTT, JOHN HILTON. 

